diff --git a/src/Problem Solving/Algorithms/Implementation/Modified Kaprekar Numbers/index.test.ts b/src/Problem Solving/Algorithms/Implementation/Modified Kaprekar Numbers/index.test.ts
new file mode 100644
index 0000000..c0ac3b8
--- /dev/null
+++ b/src/Problem Solving/Algorithms/Implementation/Modified Kaprekar Numbers/index.test.ts	
@@ -0,0 +1,7 @@
+import { kaprekarNumbers } from '@ProblemSolving/Algorithms/Implementation';
+
+describe('Problem Solving » Algorithms » Implementation » Modified Kaprekar Numbers', () => {
+    it('should return the modified Kaprekar numbers', () => {
+        expect(kaprekarNumbers(1, 100)).toBe('1 9 45 55 99');
+    });
+});